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.. _install-rdo:
Install and configure for Red Hat Enterprise Linux and CentOS
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This section describes how to install and configure the DNS
service for Red Hat Enterprise Linux 7 and CentOS 7.
.. include:: common_prerequisites.rst
Install and configure components
--------------------------------
.. note::
Default configuration files vary by distribution. You might need
to add these sections and options rather than modifying existing
sections and options. Also, an ellipsis (``...``) in the configuration
snippets indicates potential default configuration options that you
should retain.
#. Install the packages:
.. code-block:: console
# yum install openstack-designate\*
#. Create a ``designate`` database that is accessible by the ``designate``
user. Replace ``DESIGNATE_DBPASS`` with a suitable password:
.. code-block:: console
# mysql
MariaDB [(none)]> CREATE DATABASE designate CHARACTER SET utf8 COLLATE utf8_general_ci;
MariaDB [(none)]> GRANT ALL PRIVILEGES ON designate.* TO 'designate'@'localhost' \
IDENTIFIED BY 'DESIGNATE_DBPASS';
MariaDB [(none)]> GRANT ALL PRIVILEGES ON designate.* TO 'designate'@'%' \
IDENTIFIED BY 'DESIGNATE_DBPASS';
#. Install the BIND packages:
.. code-block:: console
# yum install bind bind-utils
#. Create an RNDC Key:
.. code-block:: console
# rndc-confgen -a -k designate -c /etc/designate/rndc.key -r /dev/urandom
#. Add the following options in the ``/etc/named.conf`` file::
...
include "/etc/designate/rndc.key";
options {
...
allow-new-zones yes;
request-ixfr no;
listen-on port 53 { 127.0.0.1; };
recursion no;
allow-query { 127.0.0.1; };
};
controls {
inet 127.0.0.1 port 953
allow { 127.0.0.1; } keys { "designate"; };
};
#. Start the DNS service and configure it to start when the system boots:
.. code-block:: console
# systemctl enable named
# systemctl start named
#. Edit the ``/etc/designate/designate.conf`` file and
complete the following actions:
* In the ``[service:api]`` section, configure ``auth_strategy``:
.. code-block:: ini
[service:api]
listen = 0.0.0.0:9001
auth_strategy = keystone
enable_api_v2 = True
enable_api_admin = True
enable_host_header = True
enabled_extensions_admin = quotas, reports
* In the ``[keystone_authtoken]`` section, configure the following options:
.. code-block:: ini
[keystone_authtoken]
auth_type = password
username = designate
password = DESIGNATE_PASS
project_name = service
project_domain_name = Default
user_domain_name = Default
www_authenticate_uri = http://controller:5000/
auth_url = http://controller:5000/
memcached_servers = controller:11211
Replace ``DESIGNATE_PASS`` with the password you chose for the
``designate`` user in the Identity service.
* In the ``[DEFAULT]`` section, configure ``RabbitMQ``
message queue access:
.. code-block:: ini
[DEFAULT]
# ...
transport_url = rabbit://openstack:RABBIT_PASS@controller:5672/
Replace ``RABBIT_PASS`` with the password you chose for the
``openstack`` account in RabbitMQ.
* In the ``[storage:sqlalchemy]`` section, configure database access:
.. code-block:: ini
[storage:sqlalchemy]
connection = mysql+pymysql://designate:DESIGNATE_DBPASS@controller/designate
Replace ``DESIGNATE_DBPASS`` with the password you chose for the
``designate`` database.
* Populate the designate database
.. code-block:: console
# su -s /bin/sh -c "designate-manage database sync" designate
#. Start the designate central and API services and configure them
to start when the system boots:
.. code-block:: console
# systemctl start designate-central designate-api
# systemctl enable designate-central designate-api
#. Create a pools.yaml file in ``/etc/designate/pools.yaml`` with the following
contents:
.. code-block:: yaml
- name: default
# The name is immutable. There will be no option to change the name after
# creation and the only way will to change it will be to delete it
# (and all zones associated with it) and recreate it.
description: Default Pool
attributes: {}
# List out the NS records for zones hosted within this pool
# This should be a record that is created outside of designate, that
# points to the public IP of the controller node.
ns_records:
- hostname: ns1-1.example.org.
priority: 1
# List out the nameservers for this pool. These are the actual BIND servers.
# We use these to verify changes have propagated to all nameservers.
nameservers:
- host: 127.0.0.1
port: 53
# List out the targets for this pool. For BIND there will be one
# entry for each BIND server, as we have to run rndc command on each server
targets:
- type: bind9
description: BIND9 Server 1
# List out the designate-mdns servers from which BIND servers should
# request zone transfers (AXFRs) from.
# This should be the IP of the controller node.
# If you have multiple controllers you can add multiple masters
# by running designate-mdns on them, and adding them here.
masters:
- host: 127.0.0.1
port: 5354
# BIND Configuration options
options:
host: 127.0.0.1
port: 53
rndc_host: 127.0.0.1
rndc_port: 953
rndc_key_file: /etc/designate/rndc.key
#. Update the pools:
.. code-block:: console
# su -s /bin/sh -c "designate-manage pool update" designate
#. Start the designate and mDNS services and configure them to start when the
system boots:
.. code-block:: console
# systemctl start designate-worker designate-producer designate-mdns
# systemctl enable designate-worker designate-producer designate-mdns
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